firmware/target/arm/as3525/button-e200v2-fuze.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2008 by Thomas Martitz
  11  * Copyright (C) 2008 by Dominik Wenger
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License
  15  * as published by the Free Software Foundation; either version 2
  16  * of the License, or (at your option) any later version.
  17  *
  18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  19  * KIND, either express or implied.
  20  *
  21  ****************************************************************************/
  22
  23 #include "config.h"
  24 #include "system.h"
  25 #include "button.h"
  26 #include "button-target.h"
  27 #include "backlight.h"
  28 #include "dbop-as3525.h"
  29
  30 extern void scrollwheel(unsigned wheel_value);
  31
  32 #if defined(SANSA_FUZE)
  33 #define DBOP_BIT15_BUTTON       BUTTON_HOME
  34 #endif
  35
  36 #ifdef SANSA_E200V2
  37 #define DBOP_BIT15_BUTTON       BUTTON_REC
  38 #endif
  39
  40 /* Buttons */
  41 static bool hold_button     = false;
  42 #ifndef BOOTLOADER
  43 static bool hold_button_old = false;
  44 #endif
  45
  46 void button_init_device(void)
  47 {
  48     GPIOA_DIR |= (1<<1);
  49     GPIOA_PIN(1) = (1<<1);
  50 }
  51
  52 bool button_hold(void)
  53 {
  54     return hold_button;
  55 }
  56
  57 unsigned short button_read_dbop(void)
  58 {
  59     unsigned dbop_din = dbop_read_input();
  60 #if defined(HAVE_SCROLLWHEEL) && !defined(BOOTLOADER)
  61     /* scroll wheel handling */
  62     scrollwheel((dbop_din >> 13) & (1<<1|1<<0));
  63 #endif
  64     return dbop_din;
  65 }
  66
  67 /*
  68  * Get button pressed from hardware
  69  */
  70 int button_read_device(void)
  71 {
  72 #ifdef SANSA_FUZE
  73     static unsigned power_counter = 0;
  74 #endif
  75     unsigned short dbop_din;
  76     int btn = BUTTON_NONE;
  77
  78     dbop_din = button_read_dbop();
  79
  80     /* hold button handling */
  81     hold_button = ((dbop_din & (1<<12)) != 0);
  82 #ifndef BOOTLOADER
  83     /* light handling */
  84     if (hold_button != hold_button_old)
  85     {
  86         hold_button_old = hold_button;
  87         backlight_hold_changed(hold_button);
  88     }
  89 #endif /* BOOTLOADER */
  90     if (hold_button) {
  91 #ifdef SANSA_FUZE
  92         power_counter = HZ;
  93 #endif
  94         return 0;
  95     }
  96
  97     /* push button handling */
  98     if ((dbop_din & (1 << 2)) == 0)
  99         btn |= BUTTON_UP;
 100     if ((dbop_din & (1 << 3)) == 0)
 101         btn |= BUTTON_LEFT;
 102     if ((dbop_din & (1 << 4)) == 0)
 103         btn |= BUTTON_SELECT;
 104     if ((dbop_din & (1 << 5)) == 0)
 105         btn |= BUTTON_RIGHT;
 106     if ((dbop_din & (1 << 6)) == 0)
 107         btn |= BUTTON_DOWN;
 108     if ((dbop_din & (1 << 8)) != 0)
 109         btn |= BUTTON_POWER;
 110     if ((dbop_din & (1 << 15)) == 0)
 111         btn |= DBOP_BIT15_BUTTON;
 112
 113 #ifdef SANSA_FUZE
 114     /* read power on bit 8, but not if hold button was just released, since
 115      * you basically always hit power due to the slider mechanism after releasing
 116      * (fuze only)
 117      */
 118     if (power_counter > 0) {
 119             power_counter--;
 120         btn &= ~BUTTON_POWER;
 121     }
 122 #endif
 123
 124     return btn;
 125 }
 126